Troffer lighting fixture



FIG. 1 is a top plan view of a lighting fixture showing my new design therefor;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a top right side perspective view thereof;

FIG. 6 is a top left side perspective view thereof;

FIG. 7 is a bottom front perspective view thereof; and,

FIG. 8 is a bottom side perspective view thereof. 

CLAIM The ornamental design for a troffer lighting fixture, as shown and described. 